In our day-to-day life, there are number of events about which one is not sure whether it will occur or not. One may always curious to know what chance is there for a happening of something or event to occur.
- One may be interested to estimate whether it will rain today or not.
- One may like to calculate his chances of winning for head in a definite number of tosses.
- One may want to known what are the chances that there are four aces in one had in a game of cards among four players.
The numerical quantification of certainty of an event is known as probability.